Qualifying Criteria for
Clothes Washers

Version 5.1 – January 2011

Clothes Washers must meet Canada's Energy Efficiency RegulationsThis link opens a new window. before they can qualify for ENERGY STAR in Canada.

A product shall meet all of the identified criteria if it is to earn the ENERGY STAR symbol.

1) Definitions

  1. Residential Clothes Washer
    A consumer product designed to clean clothes, utilizing a water solution of soap and/or detergent and mechanical agitation or other movement, and must be one of the following classes: automatic clothes washers, semi-automatic clothes washers, and other clothes washers.
  2. Commercial Clothes Washer
    A clothes washer, as defined above, used in common areas within multi-family housing or laundromats, where the unit is coin operated or has a card reader for payment.
  3. Modified Energy Factor
    Modified Energy Factor (“MEF”) is the present energy efficiency measure for all clothes washers. MEF is the quotient of the litre (cubic foot) capacity of the clothes container divided by the total clothes washer energy consumption per cycle, with such energy consumption expressed as the sum of the machine electrical energy consumption, the hot water energy consumption, and the energy required for removal of the remaining moisture in the wash load. The units are litres (cubic feet) per kilowatt-hours (kWh) per cycle (L/kWh/cycle/ft3/kWh/cycle). The higher the value, the more efficient the clothes washer.
  4. Basic Model
    Units of a given type of covered product (or class thereof) manufactured by one manufacturer that have the same primary energy source, which have electrical characteristics that are essentially identical, and which do not have any differing physical or functional characteristics that affect energy or water consumption.
  5. Water Factor
    Water factor (“WF”) is the present water efficiency calculation that allows the comparison of clothes washer water consumption independent of clothes washer capacity. The term is expressed as litres (gallons) per cycle per litres (cubic feet). WF is the quotient of the total weighted per-cycle water consumption divided by the capacity of the clothes washer. The lower the value, the more efficient the clothes washer.

2) Scope

  1. Included Products
    Products that meet the definition of a residential or commercial clothes washer as specified herein are eligible for ENERGY STAR qualification, with the exception of products listed in Section 2.B.
  2. Excluded Products
    Clothes washers with a capacity of less than 45 litres (1.6 ft3) and/or are configured in any way other than a front- or top-loading design are not eligible for ENERGY STAR. Also, all-in-one washer-dryers are not eligible for ENERGY STAR.

3) Qualification Criteria

  1. MEF and WF Requirements
    Table 1: ENERGY STAR Criteria for Residential Clothes Washers
      Tier 1
    (Effective July 1, 2009)
    Tier 2
    (Effective January 1, 2011)

    ≥ 50.97
    ≥ 1.8

    ≥ 56.6
    ≥ 2.0

    ≤ 1.0
    ≤ 7.5

    ≤ 0.8
    ≤ 6.0
  2. Significant Digits and Rounding
    1. All calculations shall be carried out with actual measured or observed values. Only the final result of a calculation shall be rounded. Calculated results shall be rounded to the second decimal place for MEF and the first decimal place for WF.
    2. Unless otherwise specified, compliance with specification limit shall be evaluated using exact values without any benefit from rounding.

4) Test Requirements

  1. A representative unit shall be selected for testing based on the definition for Basic Model provided in Section 1, above.  
  2. When testing clothes washers, the following test methods shall be used to determine ENERGY STAR qualification:

    Table 2: Test Methods for ENERGY STAR Qualification
    ENERGY STAR Requirement Test Method Reference
    MEF CAN/CSA-C360-03

5) Effective Date

The ENERGY STAR Clothes Washer specification shall take effect on the dates specified in Table 3, below. To qualify for ENERGY STAR, a product model shall meet the ENERGY STAR specification in effect on the model’s date of manufacture. The date of manufacture is specific to each unit and is the date (e.g., month and year) on which a unit is considered to be completely assembled.

Table 3: Specification Effective Dates
Tier 1 Effective Date Tier 2 Effective Date

July 1, 2009

January 1, 2011

6) Future Criteria Revisions

ENERGY STAR reserves the right to change the specification should technological and/or market changes affect its usefulness to consumers, industry, or the environment. In keeping with current policy, revisions to the specification are arrived at through industry discussions. In the event of a specification revision, please note that the ENERGY STAR qualification is not automatically granted for the life of a product model.